Tread portion of an automobile tire



FIG. 1 is a front view of a tread portion of an automobile tire;

FIG. 2 is a perspective view thereof;

FIG. 3 is a left side view thereof; and,

FIG. 4 is a fragmentary enlarged view showing the details of the treadportion thereof.

Broken lines in the drawing figures are intended to show environmentalstructure only, and form no part of the claimed design.

The ornamental design for a tread portion of an automobile tire, asshown and described.